N20 Euryhaline Fish with a tolerance for a

N-20 Euryhaline Fish with a tolerance for a wide range of salinity levels.

I. Fresh water

. A. Gambusia/ mosquitofish Named after the Cuban Spanish term for “useless”, this live-bearing freshwater fish is renowned for helping control insect populations. It also demonstrates sexual dimorphism.

Gonopodium: modified anal fin for depositing milt Large abdomen with gravid spot

Sometimes called “larvivorous” Can consume up to 167% of body weight in one day!!!

What’s for lunch? 367 pounds of burritos!

Reproduction possibilities in the animal kingdom: Oviparous (egg laying) birth) or Viviparous (live

ovoviviparous Emerging baby

II. Temperate brackish water

A. Three-spine stickleback Temperate zone brackish water fish. Sometimes with armor plates. No membrane connecting anterior dorsal spines.

III. Tropical brackish water

A. Black molly Sometimes sold in pet stores as an easy freshwater fish for beginners, this is actually a tropical brackish water fish.

Sailfin molly

B. Bumblebee goby Tropical brackish water fish popular with aquarists

Smallest vertebrates in the world

Fused pelvic fin: modified into a sucker

C. Archer fish tropical brackish water fish with a remarkable spitting ability

IV. Marine (but near a coast)

A. Tidepool sculpin Can withstand wide changes in their environment within the course of a day.

What could happen here?

B. Atlantic menhaden Adults spawn offshore and the larvae drift into estuaries to grow.

Kind of a generic fish (the “Atlantic shad”)

V. Super-saline habitat

An example of an EXTREMOPHILE A. Devil’s Hole Pup fish Remarkable little fish that lives in hot super-saline pools in the desert

Devil’s Hole in Death Valley

Honorable Mentions

Figure Eight Pufferfish

mudskipper

And now a little about Elodea

Elodea CHLOROPLASTS: organelles used for photosynthesis VACUOLE: water storing organelle LL CE L AL W